"This is a cheaper version of the M647 that I have on my full-sus Marin. Despite this , this is the second pair I have bought. My wife's and my Whyte Hardtail now have these and I honestly find it hard to detect any difference in their performance or durability (to date) against the more expensive M647. Both versions are excellent and provide the rider with the option to ride with ordinary trainers if you've forgotten your bike shoes (as has happened to me a couple of times). ps. Mine came with cleats when purchased"